Police say Christopher Dyson of Markham allegedly tried to rob and then shot Thomas Mastro, 24, outside of a 7-Eleven store at 167th and Oak Park.
Dyson then allegedly drove away, leading police on a car chase that ended near 147th and Oak Park. Police believe Dyson then fled on foot.
After a manhunt, he was arrested near 134th and Ridgeland near Oak Forest, officials said.
Mastro was rushed to a hospital, where he died.
Dyson was scheduled to make an initial court appearance on Saturday.
